The following title will appear on the chart: "Revenues are constantly decreasing and taxes, wages, and overhead are constantly increasing."

2. Starting at 1922 a neon light will move to the right and up along the face of the

chart up to 19.18. This line represents the increase in expenditures. When this line is completed, pictures will emerge from the back of the mirror in the sections marked "transparencies," showing the improvement in services on the railroads.

3. Following this the contrasting neon line will move down, and two "transparencies"

will emerge on the face of the mirror -- the comparison of old and new service.

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HOW MACHINt TO

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Drsienrd and Buill hy Victor M Clark & Staff. New York City

B. An Exhibit of the National Machine Tool Builders' Association, Cleveland, Ohio, at the Museum of Science and Industry in New York City.

Chapter 58 DIORAMAS

jJQl diorama is a life-like, three-dimensional representation in miniature. It is capable of reproducing any scene, sometimes employing sound and motion. The general visual effect of a diorama is similar to that which the observer gets when looking in or out of a window onto the actual scene.

A diorama, or a series of dioramas, is used principally as the focal point of an exhibit, such as a world's fair exhibit, traveling display, window or industrial museum.

The M;irrhan(l Dinramn Cotji , Mt Vrrnon. N. Y.

Diorama of the Columbia Steel Company, Subsidiary of the U. S. Steel Company, Under Construction in the Marchand Studio.